.userregister{
    display: flex;
    /*上下居中*/
    justify-content: center;
    /*左右居中*/
    align-items: center;
    height: 100vh;
    height: calc(100vh - 100px);
}
*{
    margin: 0;
    padding: 0;
}
.userregister >div>div{
    line-height: 25px;
}
.userregister-button{
    display: flex;
    justify-content: center;
}